/*
 *  Copyright 2005 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.forum.forum;

import com.blandware.atleap.common.util.PartialCollection;
import com.blandware.atleap.common.util.QueryInfo;
import com.blandware.atleap.common.ForumModuleConstants;
import com.blandware.atleap.model.forum.Forum;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.util.forum.ForumModuleWebConstants;
import com.blandware.atleap.service.forum.ForumManager;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.*;

/**
 * <p>Shows a tree of available forums.</p>
 * <p><a href="ShowForumsAction.java.html"><i>View source</i></a></p>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.1 $ $Date: 2006/05/19 09:40:22 $
 * @struts.action path="/forum/forum/showForums"
 * name="forumForm"
 * scope="request"
 * validate="false"
 * @struts.action-forward name="showForums"
 * path=".forum.forum.show"
 */
public final class ShowForumsAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

        HttpSession session = request.getSession();

        QueryInfo queryInfo = new QueryInfo();
        Map queryParameters = new HashMap();
        queryParameters.put("ignoreParent", Boolean.TRUE);
        queryInfo.setQueryParameters(queryParameters);

        ForumManager forumManager = (ForumManager) getBean(ForumModuleConstants.FORUM_MANAGER_BEAN);
        PartialCollection allForumsCollection = forumManager.listForums(queryInfo);
        Map allForums = new HashMap();
        List rootForums = new ArrayList();
        int maxLevel = 0;
        for (Iterator i = allForumsCollection.iterator(); i.hasNext();) {
            Forum forum = (Forum) i.next();
            allForums.put(forum.getId(), forum);
            if (forum.getParent() == null) {
                rootForums.add(forum);
            }
            int level = forum.getLevel();
            if (level > maxLevel) {
                maxLevel = level;
            }
        }

        request.setAttribute("allForums", allForums);
        request.setAttribute("rootForums", rootForums);
        request.setAttribute("maxLevel", new Integer(maxLevel));

        session.removeAttribute(ForumModuleWebConstants.FORUM_ID_KEY);

        // save transaction token in request
        saveToken(request);
        return mapping.findForward("showForums");
	}
}
